When Washburn, North Dakota’s town commissioners decided in January to take up the issue of whether or not to continue fluoridating the water supply for the town’s 1,300 residents, they anticipated researching the risks versus benefits and putting the matter to a vote.

What they didn’t anticipate — but soon encountered — was evidence of a coordinated effort by state actors and a national fluoride lobby group, using federal money, to crush local efforts by small towns like Washburn to stop fluoridating their water supplies.

On Monday night, town commissioners voted 4-1 to stop adding fluoride to Washburn’s water supply — making Washburn the latest in a growing list of communities across the country to end the practice in light of mounting scientific evidence that the chemical harms children’s health and provides little or no dental benefit.